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Aiman Ashraf

Subject: ASP.NET XSL custom control
Author: Aiman Ashraf
Date: 14 Sep 2005 03:45 PM

Hi to all,

It's possible to throw ASP.NET controls on to a page using XSL but is it possible to throw a .NET custom control on to a page using XSL?

This is the error I get:
Unknown server tag sec:MyCheckBox

Any help would be really appreciated

Thanks,
supernewbie

Ivan Pedruzzi

Subject: ASP.NET XSL custom control
Author: Ivan Pedruzzi
Date: 15 Sep 2005 03:59 PM

Could you post the code fragment?

Ivan Pedruzzi
Stylus Studio Team

Aiman Ashraf

Subject: ASP.NET XSL custom control
Author: Aiman Ashraf
Date: 15 Sep 2005 04:33 PM

This is the code (VB). The error is thrown at oCtl = Page.ParseControl(strOutput). The error is Unknown server tag 'sec:CheckBox'

Try
Dim xslTransform As New Xsl.XslTransform
Dim sw As New System.IO.StringWriter
Dim oCtl As Control
Dim xmlDocMain As New System.Xml.XmlDocument

xmlDocMain.Load("C:\VSSWorking\Source\EQWebApplication\MemosXMLXSL\Memos.xml")
Dim navigator As XPath.XPathNavigator = xmlDocMain.CreateNavigator()

navigator = xmlDocMain.CreateNavigator()
xslTransform.Load("C:\VSSWorking\Source\EQWebApplication\MemosXMLXSL\OICDeclined.xsl")
xslTransform.Transform(navigator, Nothing, sw, Nothing)

strOutput = sw.ToString
'remove the dummy namespace attribute
If Not strOutput = "" Then
' strOutput = strOutput.Replace("xmlns:asp=""remove""", "")
strOutput = strOutput.Replace("xmlns:sec=""remove""", "")
End If
oCtl = Page.ParseControl(strOutput)
phdExtraInfo.Controls.Clear()
phdExtraInfo.Controls.Add(oCtl)
Finally
End Try

And the xsl looks like:

<?xml version="1.0"?>
<xsl:stylesheet version="1.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:sec="remove">
<xsl:template match="/">

<TABLE id="ExtraInfoTable" style="Z-INDEX: 103; LEFT: 1px; WIDTH: 100%; POSITION: relative; TOP: 1px; HEIGHT: 1px" cellSpacing="0" cellPadding="0" border="0">
<xsl:for-each select="Memos/ODN/Security">
<tr>
<TD width="25%"><xsl:value-of select="Name"/></TD>
<td width="75%">
<sec:CheckBox id="{controlID}" style="POSITION: relative" runat="server" Width="128px" Height="32px" Text="SecurityControl"></sec:CheckBox>
</td>
</tr>
</xsl:for-each>
</TABLE>
</xsl:template>
</xsl:stylesheet>

PS: This method works great when throwing asp controls.

Thanks
Aiman Ashraf

(Deleted User)

Subject: ASP.NET XSL custom control
Author: (Deleted User)
Date: 16 Sep 2005 02:57 AM

Hi Aiman,
why do you remove the xmlns:sec namespace declaration? That operation will make the XML invalid...

Alberto

Aiman Ashraf

Subject: ASP.NET XSL custom control
Author: Aiman Ashraf
Date: 16 Sep 2005 07:28 AM

Hi,

Well, the remove xmlns:sec is done from the output string of the XSL transform method (which is html)...so that's not a problem....

Anyway, I found the solution. Though this is related more to .NET than XSL but anyway here goes:

We just have to prepend the following string to the output of the transform method:
Dim result As String = "<%@ Register TagPrefix=""sec"" Namespace=""MyNamespace"" Assembly=""MyAssembly"" %>"

Basically, this tells the page where to find the tag and the corresponding control.

Regards,
Aiman

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